Combustion engine



L. L'. CLARK.

COMBUSTION ENGINE.

APPLICATION FILED JAN.9|'1920.

1,402,57 I Pat ented Jan. 3,1922,

figi.

INVENTOR.

A TTORNEY.

WITNESS:

metres LUTHER, L. CLARK, 01F DEER TRAIL, CGLORADQ.

COMBUSTION ENGINE.

Specification of Letters Patent.

A Patented Jan. 3, 1922.

Application filed January 9, 1920. Serial No. 350,261.

To all whom it may concern:

Be it known. that I, LUTHER L. CLARK, a citizen of the United States, residing at Deer Trail, in the county of Arapahoe and State of Colorado, have invented new and useful Improvements in Combustion Engines, of which the following is a specification.

This invention relates to internal combustion engines of the two cycle type, especially designed for the use of kerosene as a fuel, although itmay be operated with any hydro-carbon mixture or with other forms of gases.

One of the objects of the present invention is to provide an engine of this character, which is exceedingly simple of construction, positive in operation and is constructed of a minimum number of parts, so that the danger of the engine becoming disabled is reduced and the life thereof materially increased.

To this end the invention includes a novel means of feeding the fuel to the cylinder and conveying the said fuel to the firing end thereof, this means including a by-pass and an automatic valve which controls the admission of fuel, the exploded gases acting to hold the valve closed until the piston passes the exhaust port, thereby relieving the pressure upon the valve by permitting the escape of the burned gases, so that the valve Wlll be opened by the pressure of the fresh charge, for the passage of this charge into the firing chamber. 4

Other novel features of the invention will appear as the following description is read in connection with the accompanying drawin s.

igure 1 represents a longitudinal sectional view of an engine constructed in accordance with the invention.

Figure 2 is a detail view of the valve for controlling the speed of the engine.

Referring more specifically to the drawings, wherein like characters of reference denote corresponding parts, the engine includes a pair of opposed cylinders 10 and 11. arranged in alignment and disposed end'to end. These cylinders are formed in three sections, outer sections 12 and an intermediate section 13, the latter being bolted to the inner ends of each of the sections 12 by bolts, which pass through flanges 14, so that the said intermediate section 13 provides a closed inner end in each of the cylinders.

The cylinders 10 and 11 are provided with a water jacket 15 into which water is admitted through an inlet port 16 for the purpose of cooling the cylinders.

Mounted for reciprocation in each of the cylinders is a piston 17', both of which are connected by a ,rod 18 which operates through a suitable packed bearing 19 in a partition 20, which divides the intermediate section 13 so as to separate the cylinders 10 and 11. One of the pistons 17 has connected to its opposlte end a rod 19, which is in turn secured to a cross head 21 which operates in guides 22. Pivotally secured to the cross head 21 is a connecting rod 23 which has its outer end suitably connected to a crank shaft 24 upon which is mounted a fly wheel 25. I

26 designates a carburetor of any approved type which is connected to the outer end of each ofthecylinders 10 and 11 I through the medium of supply pipes 27. These pipes communicate with the interior of the cylinders 10 and 11, which communication is controlled by automatic inlet valves 28. Fuel is admitted through the valves 28. being forced into the cylinders under pressure.

Communicating with the outer end of each of the cylinders is a Toy-pass pipe 29, which is adapted to conduct the charge admitted through the valve 28 to the opposite end of the cylinder, the admission of the charge at this end being controlled by a pressure valve 30 of suitable formation. An exhaust port 31 located intermediate the ends of the cylinders provides for the es ca e of the exploded charge.

n an engine of this character it will be exceedingly difficult to throttle the same by the usual carburetor throttling means. This is due to the fact that a reduction of the admitted charge would be insuiiicient to drive out all of the gases of the previously exploded charge and the engine would therefore miss fire or its operation be otherwise interfered with. To overcome this, the present invention contemplates throttling through the medium of escape ports 35, which are located at the. compression end of each of the cylinders. These ports are controlled through the medium of a slide valve 36, by means of which communication may be established or inter-' rupted between the said ports and the pipes 27 through which fuel is supplied to the cylinders. The valve 36 is operated by means of a rod 37, which is suitably geared to the crank shaft at the proper ratio to cause the ports 38 of the valve 36 to register with the ports-35 to permit of the escape of a predetermined amount of the charge within the cylinders on the compression stroke of the pistons, the amount of the charge thus escaping being determined by relative adjustment of the ports of the valve 36 and the escape ports 35. Adjustment of the valve 36 is effected by means of a rod 40 which projects from one end of the casing 41 in whichthe valve 36 rotates. The opposite end of the valve 36 is reduced as shown at 42, the said reduced portion rotating in a bearing rovided in the end of the cas ing 41 This reduced portion .receives the squared end 43 of the shaft 37, so that the valve 36 will be rotated by the rotation of the said shaft,-yet permitted a longitudinal sliding movement thereon. By adjusting the valve longitudinally of the shaft, the ports 38 may be brought into part or full register with the ports 35 so as to regulate the amount of the discharge of the unexploded fuel and thus regulate the operation of the engine. By entirely closing the ports 35, full power from the charge within the cylinders is provided and this power may be reduced, as desired, the reduction being determined by the adjustment of the valve 36, so that, when the latter is operated the ports 35 will onl be opened a predetermined amount. Xs the mixture escaping from the compression end of the cylinders is directed into the supply pipes 27, this mixture is not Wasted, but is conveyed through the said pipes to the cylinders with.

the next charge.

In the operation of the engine, a charge is admitted through the valve 28 the piston 17 in its movement towards this valve forces the charge through the by-pass 29. The piston is forced in this direction by the previously exploded charge, which acts to retain the valve 30 seated until the piston passes over the exhaust port 31. This relieves the pressure upon the valve 30 and permits of the escape of the burned gases,

so that the fresh charge being forced through the by-pass 29 opens the valve 30 to admit this fresh charge into firing end of the cylinder.

Projecting into this end of each of the cylinders is a spark plug 32, which is included in a suitable ignition circuit (not shown) for the purpose of exploding the charge.

It is believed that when the foregoing description is read in connection with the accompanying drawings, the construction,

operationand advantages of the invention will be apparent to those skilled in the art. The right is reserved to make such changes in the form, and proportion thereof as will properly fall within the scope of the appended claim.

Having described the invention, what is claimed 1s: I

In a gas engine, a pair of opposed cylinders provided with a plurality of oppositely disposed fuel inlet and escape ports adjacent the ends thereof and having exhaust ports therein intermediate said inlet and escape ports, valve controlled means for supplying fuel to said inlet ports, valve controlled means connecting the ports adj acent the ends of saidcylinders, a partition between said cylinders, an elongated casing carried'by said partition and provided with fuel inlet and exhaust ports, communicating with said fuel supply means and with said fuel escape ports in said cylinders, a rotary valve in said casing and provided with a plurality of ports, means for moving said valve longitudinally in said casing, pistons in said cylinders, a rod extending through said partition and connecting said pistons, guides secured to one of said cylinders, a

cross head engaging said guides, a rod secured to one of said pistons, extending through one of'said cylinders and secured to said cross head, a crank shaft, a rod connecting said cross head to said shaft, and means connected to said crank shaft for actuating said rotary valve.

In testimony whereof I affixiny signature.

- L. L. CLARK. 

